Question

Discussion Question: In this research study, one group was asked
to watch a car accident and were asked to estimate the speed of the
car after it "hit" the other car, while a different group also
watched an accident but instead were asked to estimate the speed
after the cars "collided." **Explain why an independent
samples t-test was used**, and give an **example of a
research study in which an independent samples t-test would be the
appropriate statistical analysis.**

Answer #1

Loftus and Palmer study (1974) demonstrated the influence of
language on eyewitness memory. Participants watched a film of a car
accident and were asked questions about what they saw. One group
was asked “About how fast the cars were going when they smashed
into each other?” Another group was asked the same question, except
the verb was changed to “hit” instead of “smashed into”. The
‘smasher into” group reported significantly higher estimates of
speed than the hit group. Suppose a...

1. In 1974, Loftus and Palmer conducted a classic study
demonstrating how the language used to ask question can influence
eyewitness memory. In the study, college students watched a film of
an automobile accident and then were asked questions about what
they say. One group was asked, “About how fast were the cars going
when they smashed into each other?” Another group was asked the
same question except the verb was changed to “hit” instead of
“smashed into.” The “smashed...

Instructions: Recall the “Witness” study from your
t-Test crash course. Research in legal psychology shows
that eyewitnesses are greatly impacted by the manner in which
investigators phrase their questions. For example, in 1974, Loftus
and Palmer conducted a study where they had participants watch a
video clip of a car accident and then answer questions about what
the participants just witnessed. They assigned participants to one
of two conditions where they altered the phrasing of one important
question: How fast...

A study was conducted to determine whether the mean braking
distance of four-cylinder cars is greater than the mean braking
distance of six-cylinder cars. A random sample of 20 four-cylinder
cars and a random sample of 20 six-cylinder cars were obtained, and
the braking distances were measured. (a) What would be the
appropriate hypothesis test for this analysis? (i) t-test for two
independent samples (ii) t-test for dependent samples (iii) z-test
for population mean (iv) correlation (b) Explain the rationale...

Instructions: In 1974, Loftus and Palmer conducted a
classic study demonstrating how the language used to ask a question
can influence eyewitness memory. In the study, college students
watched a film of an automobile accident and then were asked
questions about what they saw. One group was asked, “About how fast
were the cars going when they smashed into each other?” Another
group was asked the same question except the verb was changed to
“hit” instead of “smashed into.” The...

Loftus and Palmer studied the relationship between implicit
recall cues and memory. They manipulated the wording in questioning
subjects about an accident they had viewed on film. Students were
shown a multi-car accident and then given a questionnaire asking
them to recall details of the collision. One group of subjects were
asked to estimate how fast the cars were travelling when they "hit"
each other, while the other group was asked to estimate how fast
the cars were travelling when...

Identify a research question from your professional life or
career specialization (youth development) that can be addressed by
an independent samples t test.
Indicate why a t test would be the appropriate analysis for
this research question.
Describe the variables and their scale of measurement.
Discuss the expected outcome (for example, "The Group 1 mean
score will be significantly greater than the Group 2 mean score
because…")

10) A professor has asked a group of students to study prison
data for a class project. They were given a random sample of data
from a nearby prison. They wanted to study the relationship between
an prisoner's race and the type of offense committed for the
conviction.
a) Identify
the level of measurement for each variable.
b) What
inference test (hypothesis test) would be used to carry out this
research analysis?
11) State the Null and Alternative Hypotheses for the research...

Question: Imagine a replication of Craik and Lockhart's study
was done in which three groups were asked to engage in different
study strategies. After reading a list of words, one group of
participants had to use maintenance rehearsal (i.e., repeating the
word over and over), one group had to use elaborative rehearsal
(i.e., connecting the word to a category) and a third group had to
use a different elaborative technique (ie., using the word in a
sentence). Explain why an...

1. For each study design below, choose whether it is a one
sample T, an independent T, or a repeated measures T.
a. A gym class at a private school takes a fitness test and
their scores are compared with a fitness test of different students
at a public school.
b. Students taking Research One are tested on their research
knowledge at the start of the term and again at the end of the
term.
c. The average income for...

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